| #' Helper functions to generate inline sparklines |
| #' |
| #' @description These functions helps you quickly generate sets of sparkline |
| #' style plots using base R plotting system. Currently, we support histogram |
| #' and boxplot. You can use them together with `column_spec` to |
| #' generate inline plot in tables. By default, this function will save images |
| #' in a folder called "kableExtra" and return the address of the file. |
| #' |
| #' @param x Vector of values or List of vectors of values. |
| #' @param width The width of the plot in pixel |
| #' @param height The height of the plot in pixel |
| #' @param res The resolution of the plot. Default is 300. |
| #' @param same_lim T/F. If x is a list of vectors, should all the plots be |
| #' plotted in the same range? Default is True. |
| #' @param lim Manually specify plotting range in the form of `c(0, 10)`. |
| #' @param xaxt On/Off for xaxis text |
| #' @param yaxt On/Off for yaxis text |
| #' @param ann On/Off for annotations (titles and axis titles) |
| #' @param col Color for the fill of the histogram bar/boxplot box. |
| #' @param border Color for the border. |
| #' @param dir Directory of where the images will be saved. |
| #' @param file File name. If not provided, a random name will be used |
| #' @param file_type Graphic device. Support `png` or `svg`. SVG is recommended |
| #' for HTML output |
| #' @param add_label For boxplot. T/F to add labels for min, mean and max. |
| #' @param label_digits If T for add_label, rounding digits for the label. |
| #' Default is 2. |
| #' @param boxlty Boxplot - box boarder type |
| #' @param medcol Boxplot - median line color |
| #' @param medlwd Boxplot - median line width |
| #' |
| #' @inheritParams graphics::hist |
| #' @inheritParams graphics::boxplot |
| #' @export |
| spec_hist <- function(x, width = 200, height = 50, res = 300, |
| breaks = "Sturges", |
| same_lim = TRUE, lim = NULL, |
| xaxt = 'n', yaxt = 'n', ann = FALSE, |
| col = "lightgray", border = NULL, |
| dir = if (is_latex()) rmd_files_dir() else tempdir(), |
| file = NULL, |
| file_type = if (is_latex()) "png" else "svg", ...) { |
| if (is.list(x)) { |
| if (same_lim & is.null(lim)) { |
| lim <- base::range(unlist(x)) |
| } |
| return(lapply(x, function(x_) {spec_hist( |
| x = x_, width = width, height = height, |
| breaks = breaks, same_lim = same_lim, lim = lim, |
| xaxt = xaxt, yaxt = yaxt, ann = ann, col = col, border = border, |
| dir = dir, file = file, file_type = file_type, ... |
| )})) |
| } |
| |
| if (is.null(lim)) { |
| lim <- base::range(x) |
| } |
| |
| file_type <- match.arg(file_type, c("svg", "png")) |
| |
| if (!dir.exists(dir)) { |
| dir.create(dir) |
| } |
| |
| if (is.null(file)) { |
| file <- file.path(dir, paste0( |
| "hist_", round(as.numeric(Sys.time()) * 1000), ".", file_type)) |
| } |
| |
| if (file_type == "svg") { |
| grDevices::svg(filename = file, width = width / res, height = height / res, |
| bg = 'transparent') |
| } else { |
| grDevices::png(filename = file, width = width, height = height, res = res, |
| bg = 'transparent') |
| } |
| |
| graphics::par(mar = c(0, 0, 0.2, 0), lwd=0.5) |
| graphics::hist(x, breaks = breaks, xlim = lim, border = border, |
| xaxt = xaxt, yaxt = yaxt, ann = ann, col = col, ...) |
| grDevices::dev.off() |
| |
| if (file_type == "svg") { |
| svg_xml <- xml2::read_xml(file) |
| svg_text <- as.character(svg_xml) |
| unlink(file) |
| } else { |
| svg_text <- NULL |
| } |
| out <- list(path = file, dev = file_type, type = "hist", |
| width = width, height = height, res = res, |
| svg_text = svg_text) |
| |
| class(out) <- "kableExtraInlinePlots" |
| return(out) |
| } |
| |
| #' @rdname spec_hist |
| #' @export |
| spec_boxplot <- function(x, width = 200, height = 50, res = 300, |
| add_label = FALSE, label_digits = 2, |
| same_lim = TRUE, lim = NULL, |
| xaxt = 'n', yaxt = 'n', ann = FALSE, |
| col = "lightgray", border = NULL, |
| boxlty = 0, medcol = "red", medlwd = 1, |
| dir = if (is_latex()) rmd_files_dir() else tempdir(), |
| file = NULL, |
| file_type = if (is_latex()) "png" else "svg", ...) { |
| if (is.list(x)) { |
| if (same_lim & is.null(lim)) { |
| lim <- base::range(unlist(x)) |
| } |
| return(lapply(x, function(x_) {spec_boxplot( |
| x = x_, width = width, height = height, |
| add_label = add_label, same_lim = same_lim, lim = lim, |
| xaxt = xaxt, yaxt = yaxt, ann = ann, |
| col = col, border = border, |
| boxlty = boxlty, medcol = medcol, medlwd = medlwd, |
| dir = dir, file = file, file_type = file_type, ... |
| )})) |
| } |
| |
| if (is.null(lim)) { |
| lim <- base::range(x) |
| lim[1] <- lim[1] - (lim[2] - lim[1]) / 10 |
| lim[2] <- (lim[2] - lim[1]) / 10 + lim[2] |
| } |
| |
| file_type <- match.arg(file_type, c("svg", "png")) |
| |
| if (!dir.exists(dir)) { |
| dir.create(dir) |
| } |
| |
| if (is.null(file)) { |
| file <- file.path(dir, paste0( |
| "hist_", round(as.numeric(Sys.time()) * 1000), ".", file_type)) |
| } |
| |
| if (file_type == "svg") { |
| grDevices::svg(filename = file, width = width / res, height = height / res, |
| bg = 'transparent') |
| } else { |
| grDevices::png(filename = file, width = width, height = height, res = res, |
| bg = 'transparent') |
| } |
| |
| graphics::par(mar = c(0, 0, 0, 0)) |
| |
| graphics::boxplot(x, horizontal = TRUE, ann = ann, frame = FALSE, bty = 'n', ylim = lim, |
| col = col, border = border, |
| boxlty = boxlty, medcol = medcol, medlwd = medlwd, |
| axes = FALSE, outcex = 0.2, whisklty = 1, |
| ...) |
| if (add_label) { |
| x_median <- round(median(x, na.rm = T), label_digits) |
| x_min <- round(min(x, na.rm = T), label_digits) |
| x_max <- round(max(x, na.rm = T), label_digits) |
| graphics::text(x_median, y = 1.4, labels = x_median, cex = 0.5) |
| graphics::text(x_min, y = 0.6, labels = x_min, cex = 0.5) |
| graphics::text(x_max, y = 0.6, labels = x_max, cex = 0.5) |
| } |
| grDevices::dev.off() |
| |
| if (file_type == "svg") { |
| svg_xml <- xml2::read_xml(file) |
| svg_text <- as.character(svg_xml) |
| unlink(file) |
| } else { |
| svg_text <- NULL |
| } |
| out <- list(path = file, dev = file_type, type = "boxplot", |
| width = width, height = height, res = res, |
| svg_text = svg_text) |
| class(out) <- "kableExtraInlinePlots" |
| return(out) |
| } |
| |
| is_latex <- knitr::is_latex_output |
| |
| rmd_files_dir <- function(create = TRUE) { |
| curr_file_name <- sub("\\.[^\\.]*$", "", knitr::current_input()) |
| dir_name <- paste0(curr_file_name, "_files") |
| if (!dir.exists(dir_name) & create) dir.create(dir_name) |
| fig_dir_name <- file.path(dir_name, "figure-latex/") |
| if (!dir.exists(fig_dir_name) & create) dir.create(fig_dir_name) |
| return(fig_dir_name) |
| } |
| |